Thanks for the info so far. The pieces of the Black Hill jigsaw are slowly coming together. The wall right of Pull the Ripcord certainly looks impressive, easily one of the more appealing pieces of rock in the area. I've now talked to Steven about it.
A few years ago I met some guys who had just done Havoc and claimed it was the best climb at Black Hill. They felt it was grade 24 and worth 2 stars! They were, when I saw them, laying siege to the evil finger crack right of Half Man Half Biscuit (which a few of us had played around on quite a few years back). I don't know if it has ever been led. About grade 25 or 26 from memory.
I'm leaving out of the guide a bunch of routes which have never been popular (most have probably never seen a second ascent) and have now grown over with thick moss. These routes include Animal Husbandry (21), Maid to Undress in the Wilderness (21) and all those routes on the Shredded Evidence (17) boulder. I'm also leaving out my own Toxic Shock and Razor Blades (26) (which now looks like the Amazon jungle). Its next door neighbor, Gumboot Diplomacy (23), looks a fair bit cleaner and may still see some traffic. Maybe if I leave it in the guide it will have a better chance of getting clean again.